Projection devices are tools that display images or videos onto a surface, typically a screen or wall. They work by using light to project an enlarged version of the content from a source, such as a computer or DVD player. Common types of projection devices include LCD projectors, DLP projectors, and LED projectors, each utilizing different technologies to create clear and vibrant images. These devices are widely used in various settings, including classrooms, conference rooms, and home theaters. They allow for larger viewing experiences, making it easier for groups to see presentations, movies, or other visual content. Many modern projection devices also support wireless connections, enhancing their versatility and ease of use.